Differentiation between regio- and stereoisomers of bicyclo[3,2,0]heptanone-2 derivatives by chemical ionization mass spectrometry
β Scribed by D. Termont; F. Van Gaever; D. De Keukeleire; M. Claeys; M. Vandewalle
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- French
- Weight
- 369 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0040-4020
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract The selfβchemical ionization (SCI) in quadrupole mass spectrometry was developed to determine the structure of (E)β2βiodβ3β(phenylsulfinyl)β2βpropenβ1βol and its 6 analogues. Some techniques that increase the sample quantity and heating speed and shorten vaporization time to obtain high
The two stereoisomers (E and Z) of tertiary butyl-2-hydroxyimino-3-oxobutyrate, and of its methyl ether and ethyl ether oximes, are separated by gas chromatography and characterized by electron impact ionization (EI) and chemical ionization (CI). The isomeric (E and Z) hydroxy oximes, methyl ether a
The electron impact mass spectra of two series of 5-oxo-te~hydro-SH-tlriPzolo13,hl pyrimidine+ etbylcarboxylates and 7sxo-tetrahyBro-7H-thirzolo[ 3 , k l pyrimidine-6-ethykarboxylates were measured and fragmentation patterns examined. Structures were assigned from analysis of 0x0 molecular ion fragm
## Abstract Four 2,3βdidehydro amino acids were investigated by fast ion bombardment (FIB) and ammonia chemical ionization (NH~3~βCI) mass Spectrometry. The protonated molecules formed by the two techniques were mass selected and their respective collisionβinduced dissociations (CIDs) in the transl